Electroactive and renewable carbonaceous materials for CO2 capture in adsorption/direct heating desorption cycles.

ARÁOZ, MARÍA E.; MARCIAL, ADRIÁN FACUNDO; TREJO GONZÁLEZ, JOSÉ A.; AVILA, ADOLFO M.

Otro; 2nd IAS online poster session; 2021

International Adsorption Society

The globe is in a transition from a linear to a circular economy, which requires innovation on how materials and energy are transformed. In particular, the agroindustrial segment needs to maximize the exploitation of biomass residues and capture and transformed greenhouse gas emisions. The aim of this work is to demonstrate that tubular carbonaceous materials with electric properties obtained from sugarcane harvest residues can be used as CO2 separation agents in typical adsorption cycles. The electric conductivity of these materials was evaluated by applying different voltages between the tube ends. The temperature of the tubular element increased non-linearly when a growing potential was applied, reaching 523K in seconds at 10V. The material was tested in continuous adsorption/direct heating desorption cycles, with a feed of 14%CO2/N2 gas mixture. A peak was observed in the CO2 concentration during high temperature desorption respect to desorption at room conditions. It was possible to control the tube’s temperature in adsorption/desorption cycles by controlling the applied voltage. Finally, the material was evaluated in consecutive adsorption/direct heating desorption cycles. The renewable biocarbon tubes are robust and versatile to be used in cycles like vacuum swing adsorption, electric swing adsorption or a combination of both.